Patent · US Active

Phase-shift mask for extreme ultraviolet lithography

US11372323B2 · kind B2 · utility

0Cited by
5References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 10, 2020
Grant dateJun 28, 2022
Priority date
Expiry dateMar 10, 2040

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03F1/52
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A phase-shift mask for extreme ultraviolet (EUV) lithography may be provided. The phase-shift mask may include a substrate, a reflection layer on the substrate, and phase-shift patterns including at least one metal nitride on the reflection layer. The at least one metal nitride may include at least one of TaN, TiN, ZrN, HfN, CrN, VN, NbN, MoN, WN, AlN, GaN, ScN, and YN.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.